antvis / antvis/G2Plot

🥰 [FEATURE] 多维度(2)分组柱状图/条形图

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feature
Dominant language
TypeScript
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Description

### 🥰 Features description [Please make everyone to understand it]
想要2个维度的 分组柱状图,我用分面facet大概实现了一个下面的效果(但是存在一些问题无法实现):
![image](https://user-images.githubusercontent.com/13144324/134877479-c5e8b067-cefb-43d3-8491-f07f12de1918.png)

### 🏞 What problem does this feature solve
这个需求比较常见,比如一级维度为 省份, 二级维度为城市,想看某个省份下的各个城市的统计数据。

上面用自定义分面Facet逻辑实现的,坐标轴label自动旋转,因为是用分面逻辑拼合了多个view坐标轴实现,而坐标轴label旋转条件是 label个数大于2,导致 二级维度只有一个分组数据时,无法旋转,非常丑。

还有就是 分面拼合导致 坐标轴之间的数据重叠等问题 解决比较麻烦

想问问有没有比较好的解决方案 或者 想法

### 🧐 What does the proposed API look like

### 🚑 Any additional [like screenshots]

Contributor guide

Open the contributing guide

Research direction

The issue names no files or tests; start by reviewing the existing custom facet approach and its axis-label rotation behavior. Use the province-and-city example and screenshot to define the proposed grouped bar or column API, with acceptance checks for single-subgroup labels and axis/data overlap.

Written by the indexing model from the issue text.

Assessment

Tech stack
typescript
Domain
data-visualization
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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